How do i fix this raycasting bug

[Jinokep]

This is what is happening and this shouldnt be happening because the raycasting is only accepting terrain
Here is the code i have so far

local zonePlus = require(game.ReplicatedStorage.Modules.Zone)
local zone = zonePlus.new(workspace.GenerateZone)
local rcParams = RaycastParams.new()
rcParams.FilterDescendantsInstances = {
	workspace.Terrain
}
rcParams.FilterType = Enum.RaycastFilterType.Whitelist
for i = 1,workspace.GENERATION_SETTING.Trees.Value do
	local randomVector,touchingzonepartsarray = zone:getRandomPoint()
	local tree:Model = game.ReplicatedStorage.Misc.Tree:Clone()
	local treeSize = tree:GetExtentsSize()
	tree.Parent = workspace.Trees
	tree:MoveTo(randomVector)
	local rc = workspace:Raycast(tree.PrimaryPart.Position,Vector3.new(0,-10000,0),rcParams)
	if rc then
		print(rc.Instance)
		tree:MoveTo(rc.Position + Vector3.new(0,treeSize.Y/2,0))
	else
		tree:Destroy()
	end
end

Thanks

[Ie_fishe (paywalls)]

try to specify what the ray should do with the instances i.e allow those instances or not
rcParams.FilterType = Enum.RaycastFilterType.Blacklist

[Honuluau]

tree:MoveTo()

^ This functions sets a models position, but if there are any obstructions where the model is to be moved to, such as Terrain or other BasePart s, then the model will be moved up in the Y direction until there is nothing in the way. If this behavior is not desired, [Model:SetPrimaryPartCFrame()](Model:SetPrimaryPartCFrame) should be used instead.
source:
Model:MoveTo

You have to set the Primary Part of the Tree and adjust the position based on the ray to it. Make sure to also translate it into CFrame to use Tree:SetPrimaryPartCFrame()

[IAmBanFor_Devforum (DevforumAccount)]

Make a if statement if its not hitting terrain.